COMP Cams K11-602-4 Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Big Block 396-454

Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. K11-602-4 contains the following: 11-602-4 Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Big Block 396-454, 812-16 High Energy Hydraulic Flat Lifter Set for Chevrolet Small and Big Block., 2110 Magnum Double Row Timing Set for '65-'91 396-454 Chevrolet Big Block, 924-16 Performance Street 1.509" OD Spring; 1.900" Installed Height; 16 Springs, 612-16 Set of 16 - 10 Degree, 3/8", Single Groove Locks w/ Lash Cap Recess, 741-16 10 Degree Superlock Steel Retainer Set of 16 for 1.500"-1.550" OD Valve Spring, 505-16 Set of 16 PTFE Valve Seals for .530" Guide Size, 3/8" Valve Stem

• Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
• 2,300-6,200 RPM Operating Range
• 243/257 Duration at .050". 107 Degree Lobe Separation Angle. 0.522"/0.507" Valve Lift
• K Kits vary in their contents, but generally contain a camshaft, a set of lifters, valve springs, retainers, locks, valve seals, timing set, assembly lubricant, decals and instructions. Check description for more accurate listing of kit contents.
• Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note. Best with aftermarket converters and more rear gear.
• Perfect choice for muscle cars and street rods - Three unique cam designs: Thumpr, Mutha' Thumpr and Big Mutha' Thumpr deliver excellent horsepower gains and broad torque curve.
• Fits Chevrolet 396-454 Mark IV Big Block
• Made in USA